小浪底水库水体时空变化特征与驱动因素分析  

Spatio-temporal Change Characteristics and Driving Factor Analysis of Xiaolangdi Reservoir

作　　者：闫戈丁 景海涛[1] 王磊[1] YAN Geding;JING Haitao;WANG Lei(School of Surveying and Mapping and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000

出　　处：《地理空间信息》2024年第3期72-75,119,共5页Geospatial Information

基　　金：河南省重点研发与推广专项(科技攻关)资助项目(212102310432)。

摘　　要：以2018-2021年Sentinel-2遥感影像为数据源,利用Google Earth Engine (GEE)云平台研究小浪底水库月尺度水体面积的时空变化。结果表明,2018-2021年小浪底水库水体面积月际变化波动较大,每年均呈先降后升的趋势,具有显著的季节性变化规律,夏季汛期防洪降低库容,冬季蓄水增加库容保证生产生活用水;小浪底库区存在约85.29 km2的永久性水体,占总面积的34.84%,出现水陆变化的区域集中于水库边缘区域;气温、降水是水体变化的驱动因素,水体面积与月平均气温、月降水量呈负相关关系。研究结果表明,以GEE云平台为基础的连续时间序列、大范围水体动态变化监测存在可行性。Taking Sentinel-2 remote sensing images from 2018 to 2021 as data source,we used Google Earth Engine(GEE)cloud platform to study the spatio-temporal changes of monthly-scale water body area of Xiaolangdi Reservoir.The results show that from 2018 to 2021 the inter-month change of water body area of Xiaolangdi Reservoir fluctuates greatly,and each year shows a trend of first decreasing and then increasing.The spatio-temporal change shows a significant seasonal change pattern,with flood control reducing the reservoir capacity in summer and water storage increasing the reservoir capacity in winter to ensure production and living water.There are about 85.29 km2 of permanent water bodies in Xiaolangdi Reservoir,accounting for 34.84%.Temperature and precipitation are the driving factors of water body change,and the water area is negatively correlated with monthly average temperature and precipitation.The results of study indicate the feasibility of continuous time series and largescale monitoring of dynamic changes of water bodies based on the GEE cloud platform.

关 键 词：水体面积 小浪底水库 时空变化 GEE 驱动因素 

分 类 号：P237[天文地球—摄影测量与遥感]